Steam-boiler furnace



(N0 Model.)

y SSheetS-Sheet 1. J. V. BURKE.

STEAM BOILER PURNAGB.

Patented Dec. 6, 1892.

ATTEST;

(No Model.) 3 Sheets-#Sheet 2.

J. V. BURKE. STEAM EOILBR PUBJLGE. No. 487,602. Patented Deo, 6,-1892.

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3 Sheets-Sheet 3.

(No Model.)

J. V. BURKE.

STEAM BOILER PURNAGE.

No. 487,602. Patented. Deo. 6, 1892,.

INVENTOR:

orney.

UNITED STATES PATENT OFFICE.

JAMES V. BURKE, OF CHICAGO, ILLINOIS.

STEAM-BOILER FU RNACE.

SPECIFICATION forming part of Letters Patent No. 487,602, dated December 6, 1892.

Application fled July 2, 1892.

To all whom t may concern,.-

Be it known that I, JAMES V. BURKE, a citi-A zen of the United States, residing at Chicago, in the county .of Cook and State of Illinois, have invented a certain new and useful Improvement in Steam-Boiler Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

The present invention relates to horizontal boiler-furnaces, and more especially to that type in which the furnace, of a basket-grate construction, is arranged forward of the boiler and is fed with fuel from the top through side pocketsl that feed the fuel onto the inclined side grates of the basket-grate formation, a suitable form of which forms the subject-matter of my companion application, Serial No. 451,797, the object of the present improvement being as follows: first, to afford an improved manner of supporting the boiler independent of the furnace-walls and in which the supporting columns and footings are kept cool and protected from injurious action dueV to the heat within the furnace fire-bed, dto., by the cooling action of air-currents that are drawn through the furnace-walls and around said columns, dro., toy be discharged into the furnace to aid in the perfect combustion of the fuel; second, to provide an improved construction of the furnace proper whereby the supply of air required to effect a perfect combustion ofthe fuell is drawn in through. the furnace-walls and parts, so as to keep the same from becoming overheated and destroyed and at the same time avoid the eX- cessive radiation of heat usual to the present type of furnaces as heretofore constructed; third, to provide an improved sectional construction of the boiler-front, so as to admit of the ready removal of-the portion of the same over the furnace-arch when access is required to same for repairing or rebuilding the same; fourth, to provide an improved sectional construction of the furnace-front whereby the air-currents entering the combustion-chamber at the forward end are more evenly distributed and the front can be readily and cheaply adapted to different widths of furnaces and adj usted to the proper position in an easy and convenient manner; lifth, to afford an improved adjustable support for the boiler whereby its horizontal position can be adjusted to compensate for any irregular settling of its supports, 85e., and an even and uniform bearing attained at the different points of support for the boiler; sixth, to provide an improved construction of sliding door for the ash-pit doorway to afford ready access to the same and with which a closure of the same, when required, can be effected in a Very perfect manner; seventh, to provide an improved construction of the supporting side Walls for the arched top of the furnace, so as to afford efficient means to resist the side-thrust of the arch and prevent lateral displacement of the top portion of such walls; eighth, to provide an improved construction of feed-hopper for the side fuel-feeding pockets to attain a regulated and controllable feed of the fuel onto the inclined side grates of the furnace. I attain such objectsA by the construction and arrangement of parts illustrated in the accompanying drawings, in which- Figure lis alongitudiual section of a steamboiler furnace and setting embodying my present improvements; Fig. 2, a front elevation of the same; Fig. 3, a transverse section at line oo J0, Fig. l; Fig. 4t, a detail horizontal section at line oc Fig. 3; Fig. 5, an enlarged detail side elevation of one of my improved supports for the boiler; Fig. 6, a detail sectional elevation of the same; Fig. 7, a detail section of the boiler-front at line :1:2 oc?, Fig. 2; Fig. S, an enlarged transverse section of the furnace at line 033003, Fig. I; Fig. 9, a detail vertical section of the front wall of the furnace at line 954004, Fig. lO; Fig. IO, a detail horizontal section of the front wall of the furnace at line x5 m5, Figs. 2 and 3; and Fig. ll an enlarged detail longitudinal section illustrating the sliding door for the ash-pit of the furnace.

parts -in the several views.

As represented in the drawings, the furnace proper consists of the side walls I, usually an extension of the side walls 2 of the boilersetting, arched top 3, having fuelfeeding pockets 4 at each side, and a front wall 5, hav- Similar numerals of reference indicate like IOO ing the usual cleaning-doorway 6 and ash-pit doorway 7.

Vithin the furnace is the usual basket liregrate, formed byinclined side grate-sections S and a central fiat grate-section 9, preferably of the construction shown in my companion applicatio11,Se1ial No.451,797-to \vit-,stationl ary inclined side grates S andlongitudinallyextending rocking grate-sections forming the central grate 9.

In the present construction the fuel-feeding pockets 4 are provided with metal linings 10, ribbed or otherwise formed on their backs so as to leave air spaces or passages 11 between the same and the Walls of the pockets, as shown, it being preferable to make the linings in sections and support them in position by top flanges or rims 12, that engage the rim or mouth of the pocket, as clearly illustrated in Fig. 8. This improved arrangement admits of a current of air passing into theinterior of the furnace regardless of the condition or quantity of fuel contained in the pocket, and in consequence the lining is kept from being overheated at all times during the use ofthe furnace.

13 is a fuel-feeding hopper fitted in a fuelpocket 4, with its inner flaring or oblique side provided with an adjustable slide 14, by means of which the capacity of the fuel-pocket can be increased or decreased in a readyand convenient manner to meet the different requirements between a very rapid and slow tiring complete front, the main sections being pro` vided with hollow posts 19 to aiford a ready means for the attachment of the side or outer sections 1S, as shown in Fig. 10, and also afford a communication from the outer air to the air-space 2O in the side wall 1 ofthe furnace, and from which air is supplied to the tire-chamber at its sides to promote combus-` tion through the air passages or orifices 2l in` the side walls immediately beneath thefuel-f feeding pockets 4. (See Figs. 1 and 8.)

The cleaning-doorway 6 inthe front Wall, 5 of the furnace is formed by linings 22, be-

tween which and the brick work is left an air space or passage 23 for the passage of a current of air from the air-space 16 in to the tire, the purpose being to protect suchvlinings from the excessive heat of the fire by an in,` flow current of air. In the construction shown the air-space at the top of the lining is formed by a plate 24, that supports thebrick- Work over the doorway, 25 being openings or orifices in the furnace-front 15 for the double purpose of admitting air and forming peepholes for viewing the condition of the fire; At the inner side of the front Wall 5 the air` space will be bricked up, as shown at 26, so

as to prevent an entrance of the fuel into such space. (See Figs, 9 and 10.)

In order to strengthen the side walls 1 t0 better resist the excessive thrust of the arch due to alternate heating and cooling of the same, I tie the same together by means of cap and sole plates 27 and 28` and connecting tie-bolts 29, which bolts are arranged to pass down through the air-spaces 20 or an enlargement 30 thereof, so as to be in a measure isolated from the action of the heat Within the furnace.

The boiler-front or breeching 31 is in the present improvementdivided, so as to leave acentral removable segment 32, capable of ready detachment and removal, so that free access is gained to the rear portion of the furnace-arch in repairing or replacing the same and without the necessity ofdisturbing the main portion of the breeching, as` has heretofore been the case with this typevof boiler-furnaces.

The ash-pit doorway 7 is closed by a slid-l ing door 33, which in the present invention is hung from its top on a transversetrack 34,

extending the Width of the furnace-front, by

means of a roller or ball-bearing 35, as illustrated in Figs. 2 and 11, 36 being a shelf or bracket extending the transverse width of the furnace and arranged immediately above the track 34, so as to cover and protect-fI the same and at the Sametime atford a convenient foot-rest for the fireman, dac., in reach-1 ing the top of thc furnace and the firing-pockets 4 of the same.

The boiler 37 is supported in its yproper horizontal position by lugs or bracketson its sides, that in the present invention rest upon rollers 39 of av track 40, formed onthe top of the supportingfposts 41, such brackets` 37 being provided withjack-screws 42, by the adjustment `of which the boiler can be raised,

so' as to admit ofthe insertion of alining piece 43 of the required thickness beneath the rollers 39in effecting a proper adjustment or resting of the boiler in an even manner upon its different supports.

2 ofthe boiler-setting or Within an enlargef l The posts 4l are arranged in the air-spaces'20 of theside WallsA IOO IIO

ment of the same where such air-space isof a restricted Width, as illustrated in the drawings. Suchair-spaces preferably extend `.the length of the side Walls 2 and 1 and therear Wall 44 and are open to the air at different desired points, so as to obtain a uniform or other desired intake of air into the same at the different inlets, and the air Willbe d ischarged leither directly into the {ire-bed of the boiler or indirectly into the same through the air-chamber 45, extending` beneath the iire-bed and` formed by a horizontal oor or partition 46, extending the length `of the boiler from the bridge-wall 47 tothe Wall 48 of the cinder-pit 49 at the rear of the boiler. Air is fed into this chamber through inlets V50 and discharged into the rear end of the aShfPl..V through passage 51 and into the tire-bed.`

through the passage 52 in the secondary bridge-wall 53. The horizontal floor or partition is formed by transverse beams 54, of an inverted-T form, that support hollow tiles 55, on which in turn is laid a facing of lire-brick or tile 56. With this arrangement of the horizontal partition 46 to form an air-space over the bottom of the boiler-settings, the footin gs, dac., of the same, as well as adjacent footings of adjacent walls or columns of the building, are isolated and protected from any injurious action due to an exposure to an excessive temperature from the boiler-fu rnace. Access is gained to the air-chamber 45 through the doorway 57 in the rear wall 44 and doorway 58 in the forward wall of the cinder-pit 49.

Having thus fully described my said invention, what I claim as new, an d desire to secure by Letters Patent, is#

1. The combination, in an arched-top basliet-grate furnace, of the fuel-pockets 4 at the opposite sides of the furnace and removable linings 10, arranged within the fuel-pockets to form air-spaces 11 and provided with top flanges or rims 12, by which they are supported in place, substantially as set forth.

2. The combination, in an arched-top basket-grate furnace, of the side Wall 1, cap and sole plates 27 and 2S, and tie-bolt 29, arranged within an air-space in the wall,substantially as set forth.

3. The combination, in an arched-top basliet-grate furnace, of the side wall 1, cap and sole plates 27 and 28, and tie-bolt 29, arranged within an enlargement of the air-space in the wall, substantially as set forth.

4. The combination,in an arched-top basket-grate furnace and its side fuel-pockets 4, of the front wall 5 and metal front plate 15, formed with hollow posts 19, with the side walls 1, having an air-space 20 and air passages or orifices 21, located immediately beneath the pockets, substantially as set forth.

5. The combination, in an arched-top basket-grate furnace, of the front wall 5 and metal front plate 15, forming the inclosed air-space 16, and the doorway-linings 22, arranged within the frontwall 5, so as to form air space or passage 23 bet-Ween the lining and the front wall7 the metal front plate 15 being provided with orifices 25, in line with the air-space 23, substantially as set forth.

6. The combination, in an arched-top basliet-grate furnace and its front wall 5, of the metal front l5, formed in sections and provided with a hollow post 19, through which air is introduced into the air-space 20 in the side wall of the furnace, substantially as set forth.

7. In a steam-boiler furnace or setting, the combination of the boiler 36 with the supporting-posts 40, arranged within an air-space in the furnace walls, substantially as set forth.

8. In a steam-boiler furnace or setting, th combination of the boiler 36 and a column or post 40, arranged within an air-space 2O in the furnace-walls, that has communication with the outer air and with the interior of the furnace, substantially as set forth.

9. In a steam-boiler furnace or setting, the combination, with the boiler 36 and its supporting-brackets 37, of the supporting-track 40, bearing-rollers 39, jack-screws 42, and removable liniug-piece 43, substantially as set forth. y

10. In a steam-boiler furnace or setting, the combination of the boiler 36 and horizontal partition 46, forming an air-chamber beneath the fire-bed of the furnace, the side and rear walls of the furnace formed with air-spaces 20, open at the top of the walls and communicating with the air-chamber 45 by passages 50 through the side and end Walls, and the bridge-wall 53, having an air-passage 52 connecting said chamber with the fire-bed, sub stantially as set forth.

1l. In a steam-boiler furnace, the combination, with the metal front 15, having a door way 7, formed by an outwardlyl-projecting ange or rim having an oblique bearing-face for the door 33, of the track 34, extending the transverse width of the furnace and supported upon the top of the doorway flange or rim, the door 33, and interposed antifriction rollers or balls 35, substantially as set forth.

12. In a steam-boiler furnace, the combination, with the metal front 15, having a doorway 7, formed by an outwardly-projecting flange or rim having an oblique bearing-face for the door 33, of the track 34, extending the transverse width of the furnace and supported upon the top of the doorway flange or rim, the door 33, and a bracket or shelf 36, arranged above the track and adapted to form a foot-step in gaining access to the top of the furnace, substantially as set forth.

In testimony whereof witness my hand this 24th day of June, 1892.

JAMES V. BURKE. In presence of- ROBERT BURNS, GEO. H. ARTHUR. 

